Band clamp



J" J. SKELLY April 21, 1953 BAND CLAMP Filed Sept. 8 1951 INVENTOR.JAMES J. 5KLLY ATTOENEYJ Patented Apr. 21,1953

BAND ELAMP James 5. Skelly, Lakewood, Ohio, assignor of one-half toFenton M. Bavison, Cleveland, @hio Application September 8, 1951, SerialNo. 245,717

1 Claire. i

This invention relates to band clamps and in particular to clamps forsecuring a hose connection with necessary tension to prevent leaks underhigh pressures, that are rustand weatherlocked under vibration.conditions.

without disassembly of the parts.

liable under all conditions.

cated parts.

in locked position;

lock;

Fig. 4 is a detail view of the latch;

taken along the line 5 5 in Fig. 4; and

along the line 5-6 in Fig. 2.

objects to be clamped together.

other method.

1. a manner that the threaded portion of the bolt projects along theextended centerline of the band it. A sleeve it lies intermediate themember H3 tie loop i2.

An arcuate wall dly from the sides i l The space between the ends andprovides an opening through 32, having a length slightly longer A pairof annu- A nut threadably mounted As the compressive stress is In so Theprovision of the wall proof and are particularly adapted for installaa Achannel-shaped latch 22 has parallel side tion on aircraft engines sincecan. be safely portions 2d joined together by a bottom portion usedwithout danger of failure or becoming un- 26 adjacent one end thereof.

2% is formed on the end of each side 24, respec- The most importantobject of this invention tively, of the latch The wall 2% has a shallowis to provide a clamp which has mechanism for m .lshape with overhangingportions both above quick release of the clamp whenever it is desiredand below the centerline of the sides 2 A pair to remove the clamp forseparating the cylinof pintles Elli projects inwar drical elements, suchremoval being accomplished at substantially the center thereof and areaffixed to the latch by riveting or welding. The pin- The primary objectof this invention is to protles engage the loop l4 and rotatably jointhe .vide a,cl amp having a simple construction and latch 22 thereto.

sufficient strength to make theuse thereof reof the pintles correspondsto the slotted section of the loop i l Another object of this inventionis to provide which the bolt it moves during the latching a clamp havinga lock which renders the assemprocess. bly thereof easy and foolproofwithout compli- A cross bar than the width of the latch 22, has a bore34 for Another object of this invention is to provide slidably receivingthe bolt it.

a quick-release lock which is capable of adjustlar grooves is formed onthe bar' adjacent ment for bringing the clamp into tightened rela- 25the ends thereof and registers with the arcuate tionship with the objectto be clamped and to walls 2% when the bar 3'2 and the latch are in bepermanently latched in the clamping position. locking position.

These and other objects and features of the on the bolt it engages thebar 32 to apply teninvention will be more readily apparent from a sionthrough the latch 22 to the strap l0, as the consideration of thefollowing detailed specifi- 3Q nut ilfiis tightened along thebolt l6.

cation and appended claim taken in connection When the strap ill isplaced in operating posiwith the accompanying drawings, in which: tionin clamping relationship with the work to Fig. 1 is a perspective viewof the band clamp be held, the nut 53% is loosened and the bolt I6 isrotated into position for bringing the bar 32 into Fig. 2 is a top viewof the band clamp; 5 register with the arcuate ends 23 Of the latch Fig.3 is a sectional view taken along line 22 22. The nut 33 is then rotatedto apply tension in Fig. 2 showing the unlatched position of the to theband placed on the sides of the latch 22, the latch 22 tends to rotateso that the wall 25 moves in- Fig. 5 is a cross-sectional view of thelatch Wardly GOWPlYd e r Of e ring.

doing, it must necessarily contact the object Fig. 6 is a crosssectionalview of the lock taken being clamped which thereupon prevents furtherrotation and the possibility of the assembly Referring first to Fig. l,the numeral ill desigbecoming unlocked. The centerline of the bolt natesa band of thin flexible material for engag- 55 s 3 3 PJQQVG the 0f e p eing the circumference of a pair of cylindrical St to locate thetightening nut at a point well The band is removed from the band it,thus facilitating the has a bifurcated loop 52 formed at One endthereadjustment E of by rebending a portion of the band ill upon 25 isinstrumental in maintaining the lock in a its end and fixing it theretoby spot welding or latched position during the time the tension is Asecond bifurcated loop id is applied to the bolt it. formed on theopposite end of the band it from The possibility of distortion of thesides 24 is loop l2 in a similar manner to that of loop l2. overcome bythe channel like grooves 36 which A T-head bolt it, having a crossmember i8, is engage the end walls 28 and lock the same against 55disposed in engagement with the loop 12 in such lateral movement, thusmaintaining alignment when the tightening force is applied to the sides24. By use of the grooves 36, the structure is rendered stronger andmore reliable, failure of the latch 22 being eliminated.

When the band structure is to be unlocked, the nut 38 is loosened,whereupon, the tension is removed from the bolt I6 and the latch can berotated about the pintle 30 which will release the bar 32 from thearcuate recesses 28. The bolt l6 may then be swung about the hinge jointin the loop I2 and the clamp removed from the object with which it isused. It is noted that the simplified construction of the latch 22cooperating with the bar 32 provides a locking mechanism which is moredurable and reliable and may be manufactured at less cost than previousband looks.

The band structure may also be unlocked by loosening the nut 38 whichwill allow the cross bar 32 to move away from the recesses 28 asufiicient distance to permit the cross bar 32 to clear the overhangingportion of the sides 24. The bolt I6 may then be swung about the hingejoint in the loop l2. The clamp may then be removed from the hose orother cylindrical object in which it is installed.

It is noted that rotation of the latch member 22 takes place whentightening the clamp around a cylindrical object. In using the clamp onresilient material such as a. rubber hose, the diameter of the bandchanges as the clamp is tightened. The angle of the bolt [6 relative tothe end portion of the band ID will necessarily vary with the change indiameter. The rotation of the member therefore maintains the parts ofthe lock in uniform and proper relationship during the tighteningprocess through the entire range of adjustability provided by thequick-release band look.

It is to be understood that the specific nature of the presentdisclosure is not intended to be 4 restrictive or confining and thatvarious rearrangements of parts and modifications of design may beresorted to without departing from the scope or spirit of the inventionas herein claimed.

I claim:

A band clamp for a band having a bolt swingably mounted on one end ofthe band and extending in the direction of the projected centerline ofthe band, a cross bar slidable on the bolt, and a latch joined to theopposite end of the band for engagement with the cross bar, said latchincluding a loop on the other end of the band, said loop having a slotin the central portion thereof defining a pair of spaced eyelets, pinsin said eyelets, a channel member having openings in the center of theflange portions thereof engaged respectively with said pins, arcuaterecesses formed on one end of each of said flanges for receiving saidcross bar, annular grooves formed adjacent each end of said bar inaligned relation with said arcuate recesses to restrain distortion ofthe channel member when the grooves in the cross bar are engagedtherewith, the central portion of the body of said bolt being disposedwithin the slot in the clamp supporting end of the band and between saidpins when the band clamp is locked.

JAMES J. SKELLY.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,804,358 Lyons et a1. May 5, 1931 2,368,929 King Feb. 6, 19452,489,535 Montague Nov. 29, 1949 FOREIGN PATENTS Number Country Date793,074 France Nov. 17, 1935 144,580 Austria Feb. 10, 1936

